[chore] Bump all otel deps (#3241)

vendor/github.com/grpc-ecosystem/grpc-gateway/v2/runtime/BUILD.bazel

@@ -73,7 +73,7 @@ go_test(
         "@org_golang_google_genproto_googleapis_api//httpbody",
         "@org_golang_google_genproto_googleapis_rpc//errdetails",
         "@org_golang_google_genproto_googleapis_rpc//status",
-        "@org_golang_google_grpc//:go_default_library",
+        "@org_golang_google_grpc//:grpc",
         "@org_golang_google_grpc//codes",
         "@org_golang_google_grpc//health/grpc_health_v1",
         "@org_golang_google_grpc//metadata",

vendor/github.com/grpc-ecosystem/grpc-gateway/v2/runtime/context.go

@@ -49,6 +49,7 @@ var malformedHTTPHeaders = map[string]struct{}{
 type (
 	rpcMethodKey       struct{}
 	httpPathPatternKey struct{}
+	httpPatternKey     struct{}
 
 	AnnotateContextOption func(ctx context.Context) context.Context
 )
@@ -148,6 +149,12 @@ func annotateContext(ctx context.Context, mux *ServeMux, req *http.Request, rpcM
 	var pairs []string
 	for key, vals := range req.Header {
 		key = textproto.CanonicalMIMEHeaderKey(key)
+		switch key {
+		case xForwardedFor, xForwardedHost:
+			// Handled separately below
+			continue
+		}
+
 		for _, val := range vals {
 			// For backwards-compatibility, pass through 'authorization' header with no prefix.
 			if key == "Authorization" {
@@ -181,18 +188,17 @@ func annotateContext(ctx context.Context, mux *ServeMux, req *http.Request, rpcM
 		pairs = append(pairs, strings.ToLower(xForwardedHost), req.Host)
 	}
 
+	xff := req.Header.Values(xForwardedFor)
 	if addr := req.RemoteAddr; addr != "" {
 		if remoteIP, _, err := net.SplitHostPort(addr); err == nil {
-			if fwd := req.Header.Get(xForwardedFor); fwd == "" {
-				pairs = append(pairs, strings.ToLower(xForwardedFor), remoteIP)
-			} else {
-				pairs = append(pairs, strings.ToLower(xForwardedFor), fmt.Sprintf("%s, %s", fwd, remoteIP))
-			}
+			xff = append(xff, remoteIP)
 		}
 	}
+	if len(xff) > 0 {
+		pairs = append(pairs, strings.ToLower(xForwardedFor), strings.Join(xff, ", "))
+	}
 
 	if timeout != 0 {
-		//nolint:govet  // The context outlives this function
 		ctx, _ = context.WithTimeout(ctx, timeout)
 	}
 	if len(pairs) == 0 {
@@ -399,3 +405,13 @@ func HTTPPathPattern(ctx context.Context) (string, bool) {
 func withHTTPPathPattern(ctx context.Context, httpPathPattern string) context.Context {
 	return context.WithValue(ctx, httpPathPatternKey{}, httpPathPattern)
 }
+
+// HTTPPattern returns the HTTP path pattern struct relating to the HTTP handler, if one exists.
+func HTTPPattern(ctx context.Context) (Pattern, bool) {
+	v, ok := ctx.Value(httpPatternKey{}).(Pattern)
+	return v, ok
+}
+
+func withHTTPPattern(ctx context.Context, httpPattern Pattern) context.Context {
+	return context.WithValue(ctx, httpPatternKey{}, httpPattern)
+}

vendor/github.com/grpc-ecosystem/grpc-gateway/v2/runtime/errors.go

@@ -71,7 +71,7 @@ func HTTPStatusFromCode(code codes.Code) int {
 	case codes.DataLoss:
 		return http.StatusInternalServerError
 	default:
-		grpclog.Infof("Unknown gRPC error code: %v", code)
+		grpclog.Warningf("Unknown gRPC error code: %v", code)
 		return http.StatusInternalServerError
 	}
 }
@@ -93,6 +93,7 @@ func HTTPError(ctx context.Context, mux *ServeMux, marshaler Marshaler, w http.R
 func DefaultHTTPErrorHandler(ctx context.Context, mux *ServeMux, marshaler Marshaler, w http.ResponseWriter, r *http.Request, err error) {
 	// return Internal when Marshal failed
 	const fallback = `{"code": 13, "message": "failed to marshal error message"}`
+	const fallbackRewriter = `{"code": 13, "message": "failed to rewrite error message"}`
 
 	var customStatus *HTTPStatusError
 	if errors.As(err, &customStatus) {
@@ -100,31 +101,40 @@ func DefaultHTTPErrorHandler(ctx context.Context, mux *ServeMux, marshaler Marsh
 	}
 
 	s := status.Convert(err)
-	pb := s.Proto()
 
 	w.Header().Del("Trailer")
 	w.Header().Del("Transfer-Encoding")
 
-	contentType := marshaler.ContentType(pb)
+	respRw, err := mux.forwardResponseRewriter(ctx, s.Proto())
+	if err != nil {
+		grpclog.Errorf("Failed to rewrite error message %q: %v", s, err)
+		w.WriteHeader(http.StatusInternalServerError)
+		if _, err := io.WriteString(w, fallbackRewriter); err != nil {
+			grpclog.Errorf("Failed to write response: %v", err)
+		}
+		return
+	}
+
+	contentType := marshaler.ContentType(respRw)
 	w.Header().Set("Content-Type", contentType)
 
 	if s.Code() == codes.Unauthenticated {
 		w.Header().Set("WWW-Authenticate", s.Message())
 	}
 
-	buf, merr := marshaler.Marshal(pb)
+	buf, merr := marshaler.Marshal(respRw)
 	if merr != nil {
-		grpclog.Infof("Failed to marshal error message %q: %v", s, merr)
+		grpclog.Errorf("Failed to marshal error message %q: %v", s, merr)
 		w.WriteHeader(http.StatusInternalServerError)
 		if _, err := io.WriteString(w, fallback); err != nil {
-			grpclog.Infof("Failed to write response: %v", err)
+			grpclog.Errorf("Failed to write response: %v", err)
 		}
 		return
 	}
 
 	md, ok := ServerMetadataFromContext(ctx)
 	if !ok {
-		grpclog.Infof("Failed to extract ServerMetadata from context")
+		grpclog.Error("Failed to extract ServerMetadata from context")
 	}
 
 	handleForwardResponseServerMetadata(w, mux, md)
@@ -148,7 +158,7 @@ func DefaultHTTPErrorHandler(ctx context.Context, mux *ServeMux, marshaler Marsh
 
 	w.WriteHeader(st)
 	if _, err := w.Write(buf); err != nil {
-		grpclog.Infof("Failed to write response: %v", err)
+		grpclog.Errorf("Failed to write response: %v", err)
 	}
 
 	if doForwardTrailers {

vendor/github.com/grpc-ecosystem/grpc-gateway/v2/runtime/handler.go

@@ -3,9 +3,11 @@ package runtime
 import (
 	"context"
 	"errors"
+	"fmt"
 	"io"
 	"net/http"
 	"net/textproto"
+	"strconv"
 	"strings"
 
 	"google.golang.org/genproto/googleapis/api/httpbody"
@@ -17,16 +19,10 @@ import (
 
 // ForwardResponseStream forwards the stream from gRPC server to REST client.
 func ForwardResponseStream(ctx context.Context, mux *ServeMux, marshaler Marshaler, w http.ResponseWriter, req *http.Request, recv func() (proto.Message, error), opts ...func(context.Context, http.ResponseWriter, proto.Message) error) {
-	f, ok := w.(http.Flusher)
-	if !ok {
-		grpclog.Infof("Flush not supported in %T", w)
-		http.Error(w, "unexpected type of web server", http.StatusInternalServerError)
-		return
-	}
-
+	rc := http.NewResponseController(w)
 	md, ok := ServerMetadataFromContext(ctx)
 	if !ok {
-		grpclog.Infof("Failed to extract ServerMetadata from context")
+		grpclog.Error("Failed to extract ServerMetadata from context")
 		http.Error(w, "unexpected error", http.StatusInternalServerError)
 		return
 	}
@@ -60,20 +56,27 @@ func ForwardResponseStream(ctx context.Context, mux *ServeMux, marshaler Marshal
 			return
 		}
 
+		respRw, err := mux.forwardResponseRewriter(ctx, resp)
+		if err != nil {
+			grpclog.Errorf("Rewrite error: %v", err)
+			handleForwardResponseStreamError(ctx, wroteHeader, marshaler, w, req, mux, err, delimiter)
+			return
+		}
+
 		if !wroteHeader {
-			w.Header().Set("Content-Type", marshaler.ContentType(resp))
+			w.Header().Set("Content-Type", marshaler.ContentType(respRw))
 		}
 
 		var buf []byte
-		httpBody, isHTTPBody := resp.(*httpbody.HttpBody)
+		httpBody, isHTTPBody := respRw.(*httpbody.HttpBody)
 		switch {
-		case resp == nil:
+		case respRw == nil:
 			buf, err = marshaler.Marshal(errorChunk(status.New(codes.Internal, "empty response")))
 		case isHTTPBody:
 			buf = httpBody.GetData()
 		default:
-			result := map[string]interface{}{"result": resp}
-			if rb, ok := resp.(responseBody); ok {
+			result := map[string]interface{}{"result": respRw}
+			if rb, ok := respRw.(responseBody); ok {
 				result["result"] = rb.XXX_ResponseBody()
 			}
 
@@ -81,20 +84,29 @@ func ForwardResponseStream(ctx context.Context, mux *ServeMux, marshaler Marshal
 		}
 
 		if err != nil {
-			grpclog.Infof("Failed to marshal response chunk: %v", err)
+			grpclog.Errorf("Failed to marshal response chunk: %v", err)
 			handleForwardResponseStreamError(ctx, wroteHeader, marshaler, w, req, mux, err, delimiter)
 			return
 		}
 		if _, err := w.Write(buf); err != nil {
-			grpclog.Infof("Failed to send response chunk: %v", err)
+			grpclog.Errorf("Failed to send response chunk: %v", err)
 			return
 		}
 		wroteHeader = true
 		if _, err := w.Write(delimiter); err != nil {
-			grpclog.Infof("Failed to send delimiter chunk: %v", err)
+			grpclog.Errorf("Failed to send delimiter chunk: %v", err)
+			return
+		}
+		err = rc.Flush()
+		if err != nil {
+			if errors.Is(err, http.ErrNotSupported) {
+				grpclog.Errorf("Flush not supported in %T", w)
+				http.Error(w, "unexpected type of web server", http.StatusInternalServerError)
+				return
+			}
+			grpclog.Errorf("Failed to flush response to client: %v", err)
 			return
 		}
-		f.Flush()
 	}
 }
 
@@ -136,7 +148,7 @@ type responseBody interface {
 func ForwardResponseMessage(ctx context.Context, mux *ServeMux, marshaler Marshaler, w http.ResponseWriter, req *http.Request, resp proto.Message, opts ...func(context.Context, http.ResponseWriter, proto.Message) error) {
 	md, ok := ServerMetadataFromContext(ctx)
 	if !ok {
-		grpclog.Infof("Failed to extract ServerMetadata from context")
+		grpclog.Error("Failed to extract ServerMetadata from context")
 	}
 
 	handleForwardResponseServerMetadata(w, mux, md)
@@ -160,21 +172,30 @@ func ForwardResponseMessage(ctx context.Context, mux *ServeMux, marshaler Marsha
 		HTTPError(ctx, mux, marshaler, w, req, err)
 		return
 	}
+	respRw, err := mux.forwardResponseRewriter(ctx, resp)
+	if err != nil {
+		grpclog.Errorf("Rewrite error: %v", err)
+		HTTPError(ctx, mux, marshaler, w, req, err)
+		return
+	}
 	var buf []byte
-	var err error
-	if rb, ok := resp.(responseBody); ok {
+	if rb, ok := respRw.(responseBody); ok {
 		buf, err = marshaler.Marshal(rb.XXX_ResponseBody())
 	} else {
-		buf, err = marshaler.Marshal(resp)
+		buf, err = marshaler.Marshal(respRw)
 	}
 	if err != nil {
-		grpclog.Infof("Marshal error: %v", err)
+		grpclog.Errorf("Marshal error: %v", err)
 		HTTPError(ctx, mux, marshaler, w, req, err)
 		return
 	}
 
+	if !doForwardTrailers {
+		w.Header().Set("Content-Length", strconv.Itoa(len(buf)))
+	}
+
 	if _, err = w.Write(buf); err != nil {
-		grpclog.Infof("Failed to write response: %v", err)
+		grpclog.Errorf("Failed to write response: %v", err)
 	}
 
 	if doForwardTrailers {
@@ -193,8 +214,7 @@ func handleForwardResponseOptions(ctx context.Context, w http.ResponseWriter, re
 	}
 	for _, opt := range opts {
 		if err := opt(ctx, w, resp); err != nil {
-			grpclog.Infof("Error handling ForwardResponseOptions: %v", err)
-			return err
+			return fmt.Errorf("error handling ForwardResponseOptions: %w", err)
 		}
 	}
 	return nil
@@ -209,15 +229,15 @@ func handleForwardResponseStreamError(ctx context.Context, wroteHeader bool, mar
 	}
 	buf, err := marshaler.Marshal(msg)
 	if err != nil {
-		grpclog.Infof("Failed to marshal an error: %v", err)
+		grpclog.Errorf("Failed to marshal an error: %v", err)
 		return
 	}
 	if _, err := w.Write(buf); err != nil {
-		grpclog.Infof("Failed to notify error to client: %v", err)
+		grpclog.Errorf("Failed to notify error to client: %v", err)
 		return
 	}
 	if _, err := w.Write(delimiter); err != nil {
-		grpclog.Infof("Failed to send delimiter chunk: %v", err)
+		grpclog.Errorf("Failed to send delimiter chunk: %v", err)
 		return
 	}
 }

vendor/github.com/grpc-ecosystem/grpc-gateway/v2/runtime/marshal_json.go

@@ -24,6 +24,11 @@ func (j *JSONBuiltin) Marshal(v interface{}) ([]byte, error) {
 	return json.Marshal(v)
 }
 
+// MarshalIndent is like Marshal but applies Indent to format the output
+func (j *JSONBuiltin) MarshalIndent(v interface{}, prefix, indent string) ([]byte, error) {
+	return json.MarshalIndent(v, prefix, indent)
+}
+
 // Unmarshal unmarshals JSON data into "v".
 func (j *JSONBuiltin) Unmarshal(data []byte, v interface{}) error {
 	return json.Unmarshal(data, v)

vendor/github.com/grpc-ecosystem/grpc-gateway/v2/runtime/marshal_jsonpb.go

@@ -30,10 +30,6 @@ func (*JSONPb) ContentType(_ interface{}) string {
 
 // Marshal marshals "v" into JSON.
 func (j *JSONPb) Marshal(v interface{}) ([]byte, error) {
-	if _, ok := v.(proto.Message); !ok {
-		return j.marshalNonProtoField(v)
-	}
-
 	var buf bytes.Buffer
 	if err := j.marshalTo(&buf, v); err != nil {
 		return nil, err
@@ -48,9 +44,17 @@ func (j *JSONPb) marshalTo(w io.Writer, v interface{}) error {
 		if err != nil {
 			return err
 		}
+		if j.Indent != "" {
+			b := &bytes.Buffer{}
+			if err := json.Indent(b, buf, "", j.Indent); err != nil {
+				return err
+			}
+			buf = b.Bytes()
+		}
 		_, err = w.Write(buf)
 		return err
 	}
+
 	b, err := j.MarshalOptions.Marshal(p)
 	if err != nil {
 		return err
@@ -150,9 +154,6 @@ func (j *JSONPb) marshalNonProtoField(v interface{}) ([]byte, error) {
 			}
 			m[fmt.Sprintf("%v", k.Interface())] = (*json.RawMessage)(&buf)
 		}
-		if j.Indent != "" {
-			return json.MarshalIndent(m, "", j.Indent)
-		}
 		return json.Marshal(m)
 	}
 	if enum, ok := rv.Interface().(protoEnum); ok && !j.UseEnumNumbers {

vendor/github.com/grpc-ecosystem/grpc-gateway/v2/runtime/marshaler_registry.go

@@ -46,7 +46,7 @@ func MarshalerForRequest(mux *ServeMux, r *http.Request) (inbound Marshaler, out
 	for _, contentTypeVal := range r.Header[contentTypeHeader] {
 		contentType, _, err := mime.ParseMediaType(contentTypeVal)
 		if err != nil {
-			grpclog.Infof("Failed to parse Content-Type %s: %v", contentTypeVal, err)
+			grpclog.Errorf("Failed to parse Content-Type %s: %v", contentTypeVal, err)
 			continue
 		}
 		if m, ok := mux.marshalers.mimeMap[contentType]; ok {

vendor/github.com/grpc-ecosystem/grpc-gateway/v2/runtime/mux.go

@@ -48,12 +48,19 @@ var encodedPathSplitter = regexp.MustCompile("(/|%2F)")
 // A HandlerFunc handles a specific pair of path pattern and HTTP method.
 type HandlerFunc func(w http.ResponseWriter, r *http.Request, pathParams map[string]string)
 
+// A Middleware handler wraps another HandlerFunc to do some pre- and/or post-processing of the request. This is used as an alternative to gRPC interceptors when using the direct-to-implementation
+// registration methods. It is generally recommended to use gRPC client or server interceptors instead
+// where possible.
+type Middleware func(HandlerFunc) HandlerFunc
+
 // ServeMux is a request multiplexer for grpc-gateway.
 // It matches http requests to patterns and invokes the corresponding handler.
 type ServeMux struct {
 	// handlers maps HTTP method to a list of handlers.
 	handlers                  map[string][]handler
+	middlewares               []Middleware
 	forwardResponseOptions    []func(context.Context, http.ResponseWriter, proto.Message) error
+	forwardResponseRewriter   ForwardResponseRewriter
 	marshalers                marshalerRegistry
 	incomingHeaderMatcher     HeaderMatcherFunc
 	outgoingHeaderMatcher     HeaderMatcherFunc
@@ -69,6 +76,24 @@ type ServeMux struct {
 // ServeMuxOption is an option that can be given to a ServeMux on construction.
 type ServeMuxOption func(*ServeMux)
 
+// ForwardResponseRewriter is the signature of a function that is capable of rewriting messages
+// before they are forwarded in a unary, stream, or error response.
+type ForwardResponseRewriter func(ctx context.Context, response proto.Message) (any, error)
+
+// WithForwardResponseRewriter returns a ServeMuxOption that allows for implementers to insert logic
+// that can rewrite the final response before it is forwarded.
+//
+// The response rewriter function is called during unary message forwarding, stream message
+// forwarding and when errors are being forwarded.
+//
+// NOTE: Using this option will likely make what is generated by `protoc-gen-openapiv2` incorrect.
+// Since this option involves making runtime changes to the response shape or type.
+func WithForwardResponseRewriter(fwdResponseRewriter ForwardResponseRewriter) ServeMuxOption {
+	return func(sm *ServeMux) {
+		sm.forwardResponseRewriter = fwdResponseRewriter
+	}
+}
+
 // WithForwardResponseOption returns a ServeMuxOption representing the forwardResponseOption.
 //
 // forwardResponseOption is an option that will be called on the relevant context.Context,
@@ -89,6 +114,15 @@ func WithUnescapingMode(mode UnescapingMode) ServeMuxOption {
 	}
 }
 
+// WithMiddlewares sets server middleware for all handlers. This is useful as an alternative to gRPC
+// interceptors when using the direct-to-implementation registration methods and cannot rely
+// on gRPC interceptors. It's recommended to use gRPC interceptors instead if possible.
+func WithMiddlewares(middlewares ...Middleware) ServeMuxOption {
+	return func(serveMux *ServeMux) {
+		serveMux.middlewares = append(serveMux.middlewares, middlewares...)
+	}
+}
+
 // SetQueryParameterParser sets the query parameter parser, used to populate message from query parameters.
 // Configuring this will mean the generated OpenAPI output is no longer correct, and it should be
 // done with careful consideration.
@@ -277,13 +311,14 @@ func WithHealthzEndpoint(healthCheckClient grpc_health_v1.HealthClient) ServeMux
 // NewServeMux returns a new ServeMux whose internal mapping is empty.
 func NewServeMux(opts ...ServeMuxOption) *ServeMux {
 	serveMux := &ServeMux{
-		handlers:               make(map[string][]handler),
-		forwardResponseOptions: make([]func(context.Context, http.ResponseWriter, proto.Message) error, 0),
-		marshalers:             makeMarshalerMIMERegistry(),
-		errorHandler:           DefaultHTTPErrorHandler,
-		streamErrorHandler:     DefaultStreamErrorHandler,
-		routingErrorHandler:    DefaultRoutingErrorHandler,
-		unescapingMode:         UnescapingModeDefault,
+		handlers:                make(map[string][]handler),
+		forwardResponseOptions:  make([]func(context.Context, http.ResponseWriter, proto.Message) error, 0),
+		forwardResponseRewriter: func(ctx context.Context, response proto.Message) (any, error) { return response, nil },
+		marshalers:              makeMarshalerMIMERegistry(),
+		errorHandler:            DefaultHTTPErrorHandler,
+		streamErrorHandler:      DefaultStreamErrorHandler,
+		routingErrorHandler:     DefaultRoutingErrorHandler,
+		unescapingMode:          UnescapingModeDefault,
 	}
 
 	for _, opt := range opts {
@@ -305,6 +340,9 @@ func NewServeMux(opts ...ServeMuxOption) *ServeMux {
 
 // Handle associates "h" to the pair of HTTP method and path pattern.
 func (s *ServeMux) Handle(meth string, pat Pattern, h HandlerFunc) {
+	if len(s.middlewares) > 0 {
+		h = chainMiddlewares(s.middlewares)(h)
+	}
 	s.handlers[meth] = append([]handler{{pat: pat, h: h}}, s.handlers[meth]...)
 }
 
@@ -405,7 +443,7 @@ func (s *ServeMux) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 			}
 			continue
 		}
-		h.h(w, r, pathParams)
+		s.handleHandler(h, w, r, pathParams)
 		return
 	}
 
@@ -458,7 +496,7 @@ func (s *ServeMux) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 					s.errorHandler(ctx, s, outboundMarshaler, w, r, sterr)
 					return
 				}
-				h.h(w, r, pathParams)
+				s.handleHandler(h, w, r, pathParams)
 				return
 			}
 			_, outboundMarshaler := MarshalerForRequest(s, r)
@@ -484,3 +522,16 @@ type handler struct {
 	pat Pattern
 	h   HandlerFunc
 }
+
+func (s *ServeMux) handleHandler(h handler, w http.ResponseWriter, r *http.Request, pathParams map[string]string) {
+	h.h(w, r.WithContext(withHTTPPattern(r.Context(), h.pat)), pathParams)
+}
+
+func chainMiddlewares(mws []Middleware) Middleware {
+	return func(next HandlerFunc) HandlerFunc {
+		for i := len(mws); i > 0; i-- {
+			next = mws[i-1](next)
+		}
+		return next
+	}
+}

vendor/github.com/grpc-ecosystem/grpc-gateway/v2/runtime/pattern.go

@@ -52,13 +52,13 @@ type Pattern struct {
 // It returns an error if the given definition is invalid.
 func NewPattern(version int, ops []int, pool []string, verb string) (Pattern, error) {
 	if version != 1 {
-		grpclog.Infof("unsupported version: %d", version)
+		grpclog.Errorf("unsupported version: %d", version)
 		return Pattern{}, ErrInvalidPattern
 	}
 
 	l := len(ops)
 	if l%2 != 0 {
-		grpclog.Infof("odd number of ops codes: %d", l)
+		grpclog.Errorf("odd number of ops codes: %d", l)
 		return Pattern{}, ErrInvalidPattern
 	}
 
@@ -81,14 +81,14 @@ func NewPattern(version int, ops []int, pool []string, verb string) (Pattern, er
 			stack++
 		case utilities.OpPushM:
 			if pushMSeen {
-				grpclog.Infof("pushM appears twice")
+				grpclog.Error("pushM appears twice")
 				return Pattern{}, ErrInvalidPattern
 			}
 			pushMSeen = true
 			stack++
 		case utilities.OpLitPush:
 			if op.operand < 0 || len(pool) <= op.operand {
-				grpclog.Infof("negative literal index: %d", op.operand)
+				grpclog.Errorf("negative literal index: %d", op.operand)
 				return Pattern{}, ErrInvalidPattern
 			}
 			if pushMSeen {
@@ -97,18 +97,18 @@ func NewPattern(version int, ops []int, pool []string, verb string) (Pattern, er
 			stack++
 		case utilities.OpConcatN:
 			if op.operand <= 0 {
-				grpclog.Infof("negative concat size: %d", op.operand)
+				grpclog.Errorf("negative concat size: %d", op.operand)
 				return Pattern{}, ErrInvalidPattern
 			}
 			stack -= op.operand
 			if stack < 0 {
-				grpclog.Info("stack underflow")
+				grpclog.Error("stack underflow")
 				return Pattern{}, ErrInvalidPattern
 			}
 			stack++
 		case utilities.OpCapture:
 			if op.operand < 0 || len(pool) <= op.operand {
-				grpclog.Infof("variable name index out of bound: %d", op.operand)
+				grpclog.Errorf("variable name index out of bound: %d", op.operand)
 				return Pattern{}, ErrInvalidPattern
 			}
 			v := pool[op.operand]
@@ -116,11 +116,11 @@ func NewPattern(version int, ops []int, pool []string, verb string) (Pattern, er
 			vars = append(vars, v)
 			stack--
 			if stack < 0 {
-				grpclog.Infof("stack underflow")
+				grpclog.Error("stack underflow")
 				return Pattern{}, ErrInvalidPattern
 			}
 		default:
-			grpclog.Infof("invalid opcode: %d", op.code)
+			grpclog.Errorf("invalid opcode: %d", op.code)
 			return Pattern{}, ErrInvalidPattern
 		}